[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram'
From: |
Peter Maydell |
Subject: |
Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram' |
Date: |
Fri, 20 Aug 2021 15:39:27 +0100 |
On Fri, 20 Aug 2021 at 15:34, David Hildenbrand <david@redhat.com> wrote:
>
> On 20.08.21 16:22, Bin Meng wrote:
> > Hi Philippe,
> >
> > On Fri, Aug 20, 2021 at 10:10 PM Philippe Mathieu-Daudé
> > <philmd@redhat.com> wrote:
> >>
> >> Hi Bin,
> >>
> >> On 8/20/21 4:04 PM, Bin Meng wrote:
> >>> Hi,
> >>>
> >>> The following command used to work on QEMU 4.2.0, but is now broken
> >>> with QEMU head.
> >>>
> >>> $ qemu-system-arm -M xilinx-zynq-a9 -display none -m 40000000
> >>> -nographic -serial /dev/null -serial mon:stdio -monitor null -device
> >>> loader,file=u-boot-dtb.bin,addr=0x4000000,cpu-num=0
> >>> qemu-system-arm: cannot set up guest memory 'zynq.ext_ram': Cannot
> >>> allocate memory
> -m 40000000
>
> corresponds to 38 TB if I am not wrong. Is that really what you want?
Probably not, because the zynq board's init function does:
if (machine->ram_size > 2 * GiB) {
error_report("RAM size more than 2 GiB is not supported");
exit(EXIT_FAILURE);
}
It seems a bit daft that we allocate the memory before we do
the size check. This didn't use to be this way around...
Anyway, I think the cause of this change is commit c9800965c1be6c39
from Igor. We used to silently cap the RAM size to 2GB; now we
complain. Or at least we would complain if we hadn't already
tried to allocate the memory and fallen over...
-- PMM
- xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Bin Meng, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Philippe Mathieu-Daudé, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Bin Meng, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', David Hildenbrand, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram',
Peter Maydell <=
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Philippe Mathieu-Daudé, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Igor Mammedov, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', David Hildenbrand, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Philippe Mathieu-Daudé, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Igor Mammedov, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Philippe Mathieu-Daudé, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Igor Mammedov, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Philippe Mathieu-Daudé, 2021/08/20
- Re: xilinx-zynq-a9: cannot set up guest memory 'zynq.ext_ram', Igor Mammedov, 2021/08/20